Shaw Theresa A 4

What Happened

• Theresa A. Shaw, Senior Vice President and CATO of Ameren Corporation, sold 325 shares of Ameren in an open-market transaction on February 17, 2026.
• The shares were sold at $111.89 per share for a total transaction value of approximately $36,364. This was a sale (code S), which is often routine and does not by itself indicate a change in company outlook.

Key Details

• Transaction date & price: 2026-02-17 — 325 shares at $111.89 per share; total ≈ $36,364.
• Filing date: Form 4 filed 2026-02-19 (two days after the trade); the filing does not indicate a late filing.
• Shares owned after transaction: Not specified in the provided filing.
• Footnote: F1 indicates the number is an estimate of share equivalents held by the reporting person in the Ameren Corporation Savings Investment Plan unitized stock fund as of January 31, 2026.
• No 10b5-1 plan, tax-withholding, or other special sale mechanisms are noted in the provided information.

Context

• This sale is relatively small in dollar terms ($~36k) compared with many insider transactions. Sales by executives can be routine (e.g., diversification, personal liquidity, or tax reasons) and should not be taken alone as a signal of company performance.